Pipe-wrench.



G. H. SWARTHOUT.

PIPE WRENCH.

(Application filed Nov. 13, 1901.)

(No Model.)

Pte nted June [0, I902.

UNITED STATES PATENT OFFICE.

GEORGE H. SJWARTHO UT, OF PLAOERVILLE, CALIFORNIA, AS S IGNOR OF ONE-HALF TO MARCELLUS L. SMITH, OF PLAOERVILLE,CALIFORNIA.

SPECIFICATION forming part of Letters Patent No. 702,979, dated June 10, 1902.

A Application filed November 13, 1901. Serial No. 82.132 (No modeli) 7 I To all! whom it concern Be it known that I, GEORGE H. SwARrHoU'T,

a citizen of the United States, residing at Plafcerville, countyof Eldorado, State of California, have invented an Improvement in Pipe Wrenches; and I hereby declare the following to be a full, clear, and exact description of the same. i

. My invention relates to improvements in pipe wrenches of the type using a flexible,

gripping member. Its object is to provide a device that is simple in construction, quickly" lever with which the end of the chain or band may be engaged.

It also comprises ing or adjusting device upon the handle'and includes details which will be more fully set.

forth hereinafter, having reference to the accompanying drawings, in WhlCh-' Figure 1 is a side view of my invention.

Fig. 2'is a front View. Fig. 3 is amodificaalternate solid and hollow links.

tion of Fig. .1. Fig. 4 is a front View.

t A represents a shank or handle, near one end. of which is attached a chain 2 by means of a clevis 3. is shown as of the ordinary form, whoseglinks stand alternately at right angles to one another. The clevis is pivoted at 4, so as to be turnable over the end of the handle, and is'of sufiicient size as to allow the chain to be passed freely'through it, as in Figs. 1 and 3. The clevis end of the handle is provided with a forked projection 5, which is adapted to receive certain of the links of the chain'2 between its members' The projection 5 may p pe.

a supplementary tighten- In'the present case this chain pipe tightly, forthe greater the tension the firmer the grasp of the wrench.

The great 'advantageof this wrench over all chainwrenche's ofwhich I have any knowledge is that it completely encircles the pipe and ap lies precisely the same pressure on every p0 nt on the circumference of the Most chain wrenches employ a fixed bitor jaw which cooperates with the chain,

butwhich chain usually does not completely encircle the pipe. 7 "greatest pressure is exerted at the point or The result is that the points of contact of the jaw, and the pipe is crushed or dented atthose places.

If a finer adjustment of the chain" on the pipe is desired than can be obtained by the device above referred to and shown in Fig. 1, I may make a wrench after the design seen in'Fig. 3. In this case the handle A is slotted near one end, as at 6. One edge of the bar is ratcheted or toothed, .as 7, and a sleeve 8, movable by means of a worm 9, engaging the rack 7, is carried on the handle. -The clevis 3 is pivoted to the sleeve, and the pin 4 operates in the slot 6. The chain 2 is secured,

as before, to the clevis, and its operation is iprecisely as in the first instance.

however, I have shown a chain consisting of In Fig. 3,

The projection 5' instead of being forked is in the form of a book which is adapted to receive one'of the hollow lin'ks after the chain has beeupassed through the clevis. I By operating the worm to move the sleeve, and consequently' the pivot end of the clevis nearer or farther from the end of the handle, the grip I of the chain on the pipe may be adjusted to take up any slack remaining after the chain has been engaged by the hook.

' 'Of course it is understoodthat'either form of chain and corresponding hook member may 'be used in eitherstyle of wrench, or I may chain pivoted near one end of said handle, a ICO member longitudinally movable upon the handleand to which the chain is pivoted, said chain having a link or member adjacent to the pivot-point of sufficient Width to admit the passage of the chain therethrough, whereby the chain may be able to encircle a pipe completely, and a projection upon the handle with which the free end of the chain may be engaged.

2. The combination in a pipe-wrench of a handle, a member slidable longitudinally upon said handle, a chain pivoted to said slid able member, and means upon the end of the handle by which a link of the chain may be engaged.

3. The combination in a pipe-wrench of a handle, a member slidable longitudinally upon said handle, a clevis pivoted to said member and freely turnable across the end of the handle, a chain secured to said clevis and adpted to be passed therethrough to encircle a pipe completely, and a means upon the handle by which alink ofsaid chain may be engaged.

4. The combination in a Wrench of a handle, a sleeve movable longitudinally thereon, a flexible gripping member pivoted to said sleeve and movable therewith, and means upon said handle whereby the free end of the gripping member may be engaged.

5. The combination in a Wrench of a handle, a clevis pivoted to said handle and adj ustable longitudinally thereon, a flexible gripping member secured to said clevis and adapted to pass through said clevis to encircle a pipe completely, and means upon the handle whereby said grip member so passed through the clevis may be engaged.

6. The combination in a pipe-Wrench of a handle, a sleeve movable longitudinally upon said handle, a clevis pivoted to said sleeve, a slot in the handle in which the pivot of said clevis is slidable, a chain secured to and adapted to be passed through said clevis so as to completely encircle a pipe and a projection upon the handle with which a link of the chain may be engaged.

In witness whereof I have hereunto set my hand.

GEORGE H. SWARTI-IOUT.

\Vitnesses:

GEO. I'I. THoMPsoN, E. W. WrrMER. 

